Underwater lighting fixture with color wheel and method of control
US6811286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Oct 3, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/401
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An underwater lighting fixture adapted for installation in a lamp receiving recess in the wall of a swimming pool. The fixture includes a lamp housing having a pair of reflector-mounted incandescent lamps mounted therein. A plate having a pair of a apertures is mounted in the housing with the apertures mounted in alignment with the lamps. A pair of secondary reflectors are mounted to face the plate apertures and are provided with light-transmitting portals. A color wheel having dichroic filter segments is mounted so that identically colored pairs of segments pass the portals when the color wheel is driven by a motor. The motor is controlled by a circuit by disconnecting power to an input of the circuit, reconnecting power to the input to control the motor to move at a first speed. The control circuit stops the motor when the driven element reaches an index position. After the step of reconnecting power and after a predetermined period of time, the control circuit controls the motor to move the driven element at a second speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.